Start consolidating cross-port file selection code into ui/base/dialogs.

chrome/browser/ui/webui/tracing_ui.cc

Index: chrome/browser/ui/webui/tracing_ui.cc
diff --git a/chrome/browser/ui/webui/tracing_ui.cc b/chrome/browser/ui/webui/tracing_ui.cc
index 23a2639b16119cdde09217057c0d9d6217ce6c9d..b6eacda66b3521b5fed5981172b9a0bc8ab773f2 100644
--- a/chrome/browser/ui/webui/tracing_ui.cc
+++ b/chrome/browser/ui/webui/tracing_ui.cc
@@ -14,6 +14,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
+#include "chrome/browser/chrome_select_file_policy.h"
 #include "chrome/browser/gpu_blacklist.h"
 #include "chrome/browser/gpu_util.h"
 #include "chrome/browser/profiles/profile.h"
@@ -342,7 +343,9 @@ void TracingMessageHandler::OnLoadTraceFile(const ListValue* list) {
       SelectFileDialog::SELECT_OPEN_FILE,
       string16(),
       FilePath(),
-      NULL, 0, FILE_PATH_LITERAL(""), web_ui()->GetWebContents(),
+      NULL, 0, FILE_PATH_LITERAL(""),
+      ChromeSelectFilePolicy::DisplayInfobarCallback(
+          web_ui()->GetWebContents()),
       web_ui()->GetWebContents()->GetView()->GetTopLevelNativeWindow(), NULL);
 }
 
@@ -373,7 +376,9 @@ void TracingMessageHandler::OnSaveTraceFile(const ListValue* list) {
       SelectFileDialog::SELECT_SAVEAS_FILE,
       string16(),
       FilePath(),
-      NULL, 0, FILE_PATH_LITERAL(""), web_ui()->GetWebContents(),
+      NULL, 0, FILE_PATH_LITERAL(""),
+      ChromeSelectFilePolicy::DisplayInfobarCallback(
+          web_ui()->GetWebContents()),
       web_ui()->GetWebContents()->GetView()->GetTopLevelNativeWindow(), NULL);
 }